| The simulation technology is concerned with the new and high technology fields such as computer science, internet & communication, figure & picture, multimedia, software engineering, information processing, automatic control and so on. With the advanced development in these fields, system simulation technology has developed further and has been applied in more and more situations. Marine Engine Room Simulator is a kind of novel simulation system in the purpose of educating and training the marine engineers in charge of administration and operation. Our university has successfully developed SMSC-2000 Marine Engine Room Simulator. It was inspected and accepted by the Ministry of Communication of China in April 1999 and passed the authentication of the scientific fruit in December 1999. Its function of training perfectly meets the requests of STCW78/79 by IMO (International Maritime Organization) and the requirement stipulated by Chinese Maritime Society Authority on the outline of eligibility certification, examination and evaluation for shipping sailors. Besides, its technological achievements reached the worldwide advanced level of the middle of the 90's.Science and technology is always advancing without ceasing, staying backward means being washed out. In the view of latest technology development, the original SMSC-2000 has some deficiencies, e.g., some techniques need to be updated, some improvements on system performances are required, etc. This is just the background of this dissertation. It aims to investigate and realize some new techniques for simulation system development in accordance with the integrated simulation platform and hence to result in more perfect developing techniques for marine engine room simulators. Meanwhile this task is also a part of "Multi-Mode Engine Room Simulation System"- an laboratory-constructing project of Shanghai Maritime University Shipping Simulate Center which is one ofthe key laboratories of the Ministry of Communication. As we know, Pneumatic Operation System for Marine Engine is an important component of the Marine Engine controlling system. Without being manipulated properly and adroitly or failing to resolve relevant faults in time, the normal running of the shipping will be endangered. In order to strengthen sailorman's training in this field, we developed Simulation System of Pneumatic Operation for Marine Engines based on the present Marine Engines Room Simulator. This paper introduced the structure and function of this system, emphasizing its character of real-time online control & simulation.The paper focused on this task and covered these contents: realizing the real-time, online and dynamic simulation of the Pneumatic Operation System for Marine Main Engine on the basis of analyzing the Pneumatic devices' principle and by the means of multimedia technology; describing dynamically the flowing direction of the controlling pneumatic line according to its logical relations in the three working conditions-starting, stopping and reversing. At the same time, the paper discussed the establishment of mathematics simulation model for Digital Governor DGS-8800 according to the traditional PID control model. It also comes up with the idea of optimizing the speed-adjusting system for the marine main engine by making use of fuzzy control theory.The dissertation is outlined below. Firstly the construction of MAN B&W marine engine control system is briefly introduced. Specifically, construction & logical relationship of the B&W Pneumatic control equipment and hardware construction & the speed-regulating principle of DGS-8800-the Digital Governor device are analyzed. Chapter 3 is devoted to an introduction of structure and function of Simulation System of Pneumatic Operation for Marine Engine, which was conducted by us, emphasizing its character of real-time online control & simulation. That's to say, Industrial Control Computer was responsible for data acquisition system and real-time control, while Simulative Control Screen for Marine Engines and software inte... |
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